import { asyncRoutes, constantRoutes } from '@/router'

/**
 * Use meta.role to determine if the current user has permission
 * @param roles
 * @param route
 */
function hasPermission(roles, route) {
  if (route.meta && route.meta.roles) {
    return roles.some(role => route.meta.roles.includes(role))
  } else {
    return true
  }
}

/**
 * Filter asynchronous routing tables by recursion
 * @param routes asyncRoutes
 * @param roles
 */
export function filterAsyncRoutes(routes, roles) {
  const res = []

  routes.forEach(route => {
    const tmp = { ...route }
    if (hasPermission(roles, tmp)) {
      if (tmp.children) {
        tmp.children = filterAsyncRoutes(tmp.children, roles)
      }
      res.push(tmp)
    }
  })

  return res
}

export function filterAsyncRoutesByAuths(routes, auths) {
  // debugger
  const res = []
  routes.forEach(route => {
    const tmp = { ...route }
    let auth
    if (tmp.meta && tmp.meta.auth &&
      (auth = (auths.find(auth => auth.type !== 2 && tmp.meta.auth === auth.route)))) {
      if (tmp.children && auth.children) {
        tmp.children = filterAsyncRoutesByAuths(tmp.children, auth.children)
      } else {
        tmp.children = []
      }

      res.push(tmp)
    }
  })

  return res
}

const state = {
  routes: [],
  addRoutes: []
}

const mutations = {
  SET_ROUTES: (state, routes) => {
    state.addRoutes = routes
    state.routes = constantRoutes.concat(routes)
  }
}

const actions = {
  generateRoutes({ commit, dispatch }, roles) {
    return new Promise(async resolve => {
      const auths = await dispatch('user/getAuths', null, { root: true })
      const accessedRoutes = filterAsyncRoutesByAuths(asyncRoutes, auths)
      // const accessedRoutes = asyncRoutes
      // if (roles.includes('admin')) {
      //   accessedRoutes = asyncRoutes || []
      // } else {
      //   accessedRoutes = filterAsyncRoutes(asyncRoutes, roles)
      // }

      commit('SET_ROUTES', accessedRoutes)
      resolve(accessedRoutes)
    })
  }
}

export default {
  namespaced: true,
  state,
  mutations,
  actions
}
